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Radiating direction control unit of lighting device for vehicle use

  • US 6,302,553 B1
  • Filed: 07/26/1999
  • Issued: 10/16/2001
  • Est. Priority Date: 08/24/1998
  • Status: Expired due to Fees
First Claim
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1. A radiating direction control unit of a lighting device for vehicle use comprising:

  • level detection means for detecting a change in a level of a vehicle axle section of one of a front and a rear wheel of a vehicle and for emitting a signal corresponding to the detected level change of the vehicle axle, inclined attitude detection means for detecting an inclination of the vehicle in a direction transverse to a longitudinal direction of the vehicle and for emitting a signal corresponding to the detected inclination of the vehicle; and

    control means for determining a pitch angle of the vehicle based on the signal corresponding to the detected level change of the vehicle axle section and for correcting a radiating direction of the lighting device in accordance with the determined pitch angle and the detected inclination of the vehicle;

    wherein the control means corrects the radiating direction of the lighting device in accordance with the determined pitch angle only when a change in the inclination of the vehicle in the transverse direction is not detected by the inclined attitude detection means.

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